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COMPOSITE POLYACRYLONITRILE NANOFIBERS POSSESSING POTENTIAL USE IN FILTRATION

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Author(s): O. B. Berkalp | U. K. Sahin | I. Gocek | R. Keskin | N. Acarkan | S. Ozkan | C. D. Dikmen | E. Daskaya | H. Saglam

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 2;
Start page: 32;
Date: 2013;
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Keywords: Filtration | electrospinning | coal | nanocomposite | polyacrylonitrile | nanoparticle reinforcement.

ABSTRACT
Electrospinning process is utilised to fabricate submicron level fibrous mats that can be easily used as filter media due to their high filtration efficiency and low air resistance. Therefore, the goal of this study is design and fabrication of electrospun composite-structured polyacrylonitrile (PAN) nanofibrous mats possessing small pores and well-dispersed nanoparticles in the polymeric matrix. For the fabrication of these composite nanofibrous mats, fiber grade PAN was utilised as the polymeric matrix. 8 wt.%, 10 wt.%, 12 wt.% and 14 wt.% solutions of PAN were prepared in N,N-dimethyl formamide (DMF), and mixed with different weight percent coal nanoparticles such as 0, 0.5, 1, 1.5 and 2%. PAN was selected as the polymer for the fabrication of the nanofibrous mats due to its versatility to easily fabricate electrospun mats, hydrophobicity, and also insolubility in a wide range of solvents. After submicron level coal particles were blended mechanically with the PAN solutions prepared, ultrasonication was used to better disperse the filler particles in the solution of the polymeric matrix. Voltage, polymer solution flow rate and the distance between the syringe and the collector during electrospinning were considered as constant parameters. Twenty different nanofibrous nanocomposite mats were manufactured for assessing the manufacturability of PAN nanofibers containing coal particles and analyses were conducted on these electrospun nanofibrous mats for demonstrating their potential application as filter media.
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